Metal-sawing machine.



PATBNTED APR. 9, 1907.

G. A. JUBNGST.

Y METAL SAWING MACHINE.

APPLICATION FILBD 'KAR. 29, 1904. l

` 4 SHEETS-SHEET 1.

4 sums-SHEET 2.

PATBNTED APR. 9l 1907.

C. A. JUENGST.

,METAL SAWING MACHINE.

APPLICATION FILED 11.111,29, 1904.

110.849.793. PATENTE) APB. 9, 1907.

G. A. JUBNGST.

METAL SAWING MAGHINB.

APPLICATION FILED MAB. 29, 1904.

4 sHnnTs--SHBET 3,

THE NoRRls PE'I'EIls-cn. wAsHlNaroN. n. c.

PATENTED APR. 9, 1907.

' c. A. JUENGST.

METAL SEWING MACHINE.y

EPPLIoATIoN FILED un. 29, 1'904.

' 4 SHEETS-SHEET 4.

@JTW

THE mmm: PETERS co.,

UNITED STATES PATENT OFFICE.

CHARLES A. JU ENGST, OF CROTON FALLS, NEW YORK, ASSIGNOR TO I-IIGLEY MACHINE COMPANY, OF CROTON FALLS, NEW YORK, A CORPORATION OF NEW YORK.

METAL-SAWING MACHINE.

Specification of Letters Patent.

'Patented April 9, 1907.

Application filed March 29, 1904. Serial N01 200,509.

provement in Metal- Sawing Machines, ofV

which the following is a specification.

My invention relates to a machine for sawing articles of metal, especiallyin a cold state; and the essential object of my present invention is the provision of automatically-operating devices yielding for the disconnection of the feeding devices under excessive load.

In carrying out my invention the saw is mounted on a carriage and means are provided both for revolving the saw and for progressively feeding the saw and carriage along with the progress of the work, the work being mounted upon a table in and along which the saw and carriage are moved. Means are provided which when moved in one direction connect a screw feeding-shaft and a coacting set of revoluble parts with a continuouslyrevoluble wheel for feeding the saw and carriage forward and which means when moved in the opposite direction connect the screw feeding-shaft with another and different set of parts continuously revoluble for feeding the saw and carriage in a reverse or backward direction for retracting the saw from the work, and other and suitable devices are provided which are manually actuated for applying a graduated tension to devices adapted to yield under excessive load for the disconnection of the feeding devices for momentarily retarding or stopping the movement of the machine.

In the drawings, Figure l is a side elevation and partial section representingl the devices of my improved machine. Fig. 2 is a plan and partial section of the same without the table, Fig. 3 is an end elevation and section at the dotted line a: of Fig. l. Fig. 4 is an elevation and section at the dotted line y y of Fig. 2. Fig. 5 is an elevation and section at the dotted line e z of Fig. 3, and Fig. 6 is an elevation and section at the dotted line it' of Fig. 3. Fig. 7 is a section at the dotted line y y of Fig, 1. Figs. 3, 4, 5, 6, and 7 show the parts in larger size than in the other figures.

The bed a, frame a', and table a2 are preferably of cast metal of sufficient dimensions and strength to support the various operative parts hereinafter described. The table has an opening for placing the saw, and the frame a is provided with slideways 2 for acarriage composed of a body b, brackets b b2, a depending bracket ?73, an arbor 3 for the saw c, and guides 4 4, secured to the carriage and bearing at points of the saw opposite to the arbor and one of which is adjacent to the place where the power is applied to rotate the same. The carriage rests upon the slideways 2 and is movable thereon.

A shaft d extends transversely of the bed a outside the frame a. It is carried at one end upon a standard 5, having a bearing-sleeve d2, and at the other end upon the standard 10.

d is a xed clutch at the outer end of the shaft d, and e a pulley for the power-belt loose upon the shaft and having a hub 7, which is provided with a clutch e', adapted to engage the clutch d', and said hub is also provided with a lever device e2, pivoted at one end to a bracket 6, secured to one side of the frame or bed and having rollers engaging a circumferential groove of the hub 7. A handle e3 forms a prolongation of the lever device e2, and when the same is grasped and moved with the lever device acting upon the hub of the pulley c the same is moved with its clutch toward the clutch d, iixed upon the shaft d, and when said clutches engage the rotary movement and power of the pulley e is communicated to the shaft d.

A shaft g runs at right angles and in the same plane to the shaft d through and lengthwise of the frame c of the sawing-machine. This shaft g at one end is provided with a bearing-sleeve e7 through the end of the frame, and on the end of the shaft g is a bevelwheel f, with an integral belt-ilangej". The bevel-wheel f meshes with the bevel-pinion )"2 on the shaft d, and by said bevel-pinion and bevel-wheel the rotation and the power of the shaft are communicated to the shaft g. The shaft g is provided with a longitudinal groove 8. This shaft passes through the bracket b3, extending downward from the carriage, and around said shaft in said bracket is a sleeve 7L, and upon this sleeve are collars at either side of the bracket b3 and a bevel-pinion L, the sleeve being splined to the shaft g, so as to rotate therewith, but travel along the shaft with the bracket b3 and the carriage, which said bracket is a part of.

In suitable bearings in the carriage there IOO IOS

is a shaft ZL, with a gear Zi2 on one end thereof meshing with the bevel-pinion Zi, and toward the other end of said sha-lit hetween its bearings is a spr eliet Zi", the teeth ot whieh are adapted to enter the holes provided in the saw `for its rotation. Therefore the rotation and power neeessary 'for the rotation and. the work of the saw is eonnnunieated Jfrom the shaft (Z through the hevel-pinionj'z, hevel-wheel f, sha'lit g, sleeve Zi, the bevelpinion t, the gear h2, the sha'lt 715, and the spro-@ket ZL", the saw Continuously revolving so long as the fixed oluteh b/ and the movable Clutch e of the pulley e are in engagement. A disengagement ot these parts is quiekly and readily etl`eeted hy moving the lever e in the opposite direction.

Between the br elets Zi if! oit the earriage l provide a sleeve i, a nut i', seeured in the end b2, the nut and sleeve boing eonneeted hy a eouplin g 9. A screw-shaft i? passes through the nut 'i' and 'lreely into the sleeve t' at one end, and at its other end it passes through the 'trame a of the maehine and through the sleeve r, whieh sleeve is provided with a housing r and with opposite side rilos r2, whieh engage slideways of the standard 11., seeured to the 1oed ot the maohine.

On the end ot the shaft d 'adjaeent to the standard 1() there is a sinooth-peripheryfrietion-wheel Zr. This is normally in I:lose proximity to, but not in eontaet with, a similar wheel 7c on a shaft Z in hearings forming part of the housing r. T he sha'lt Z is provided with a worm Z, (see Fig. 3,) whieh meshes with a worin-wheel Z2, loose upon. the shaft t2 and located within the housiiig r of the sleeve r and. provided on its outer faee around the shalt t" with `clutch-teeth 12. Upon this sha'l't fig are Collars .13, 14, and 15 for the purpose ot locating several parts and limiting their movement, the eollar 15 eoining against the outer surfaee ot the wormwheel Z2 within the boundary of the elutehteeth 12 and acting to hold said worm-wheel Z"l against the sleeve r, and l have shown and pre'ter` to employ between the juxtaposed faees of the worm-wheel Z2 and the sleeve r an anti'irietiori-bearing 32, so that the said worm-wheel may turn 'freely with reterenee to the non-turning sleeve.

A eluteh m is splined upon the shaft i and is provided with engaging teeth at its opposite ends, and a lever m, pivoted to the standard 11, is provided with a roller 16, ants ing between the toothed langes oi the eluteh, so as to move the saine in opposite direetions at the will of the operator, and this lever m is pre'lerahly provided with a guide-rod mi, (shown in Fig. 1. only.) pivoted thereto, and which guide-rod moves through a 'frictionbearing in the end oi" the `traine a, so as not only to steady the lever, lout to hold it in either of its extreme positions. Loose upon the shaft if! is a sleeve n. on one end oi whieh there are eluteh-teeth n', adapted to engage the teeth on one end olIV the eluteh fm, and on the other end olf this sleeve there is a gearwheel/117i. 'lhe said sleeve eoniing hetween the eollars 13 14 oll the shal't /ifl is iixed in its posi tion.

i employ a stiul-plate o, through whieh the screw-shaft fig passes and upon whirh shaft the stud-plate is supported. rlliis stud-plate is adapted to swing and is provided with slots and with holts 1S, passing through the stud-plate into the end lfraine ol' the maehine lior adjustahly seeuring the said stud-plate in the position to wiiieh it niafr he moved. @n the lower end. olx this stud-plaie o is an arhor o and on the arhor a, gear and l eltllarigo o2. The helt 17 passes around the helt-llange j" ot the hevel-wheel f and around the heit-flange ol,E the gear o?, and this oelt is tightened hy the swinging inmenienl that can he imparted to the stud-plate o upon the shalt i?, and tor the purpose olu adjusting this sti'id-plate andthe ge: i and hehflange 02, carried. hy the studio thereol, l provide a hleek 19 upon the traine a and a screw-stein 'passing through the lower end olv the stud-plate o and hearing against the hloel 1Q, there heing a hand-wheel on the outer Atree end of the serew-steni 2f) l'or revolving the saine and tor therehy inoring the stud-plate o when the holts 18 are loosened. "he gear o2 and the gear n? are in` inesii. Therefore the rotation and the poner that are continuously applied to the shalt d and troni the saine to the lievel-pinionj-- and the bevel-wheel are eonnnunieated therel'roin hy the helt-llaiigej" o'l this hevel-n'heel, the loelt 1.7, the gear and. lieltdlange of to the gear n2, sleeve n, and eluteh-teeth n, so that these parts are continuously revolving. the loeation ot the sleeve fa, hereinhelore stated, heing VliXed hetween the collars 13% and 1.4 on the shaft i2.

The extreme outer end olt the shait fi is oli set and is provided. with a sleeve fr, whielA sets up against the oll'set shoulder and is ol" greater thickness I`than the reduetion ol the shaft, and on the end olE the. shatt there is a nut o, holding the sleeve 'o in position. Surrounding and secured to the shalt "5 nea r its end is a sleeve 22, wl'iieh ahuts up against the end oll the sleeve if, this latter sleere holding the sleeve 22 in position. The sleere Z2 is provided with eluteh-teeth on the pori tion thereof whieh surrounds the sleeve r. and. a sleeve 23, also with eluteh-teetlz. surrounds the sleeve o, there heing a handle .31 connected with the sleeve 23.V Yin the position Fig. 1 the olutehfteeth oll these paris are not in eontaet; hut when in eontaet ii is quite evident that the turning ot the handle 24 and sleeve 23 will eause a rotation oi 'the shaft i2, so that the saw and its earriage niar he 'ted along an appreeiahle distante hy hand.

A toothed seetor s, lligs. 2, Si, and is secured by a connection to the side of the the lower portion of this toothed sector and through parts of the standard 11. On this shaft and outside of the toothed sector s is a lever s, the hub of which is secured to the shaft S2. Pivoted to the lever s/ is a pawl 29, (see Fig. 5,) which engages the teeth of the sector s. A rod 30 extends upward of the handle from the pawl 29 and is connected to "f a hand-latch 31, (see Fig. 1,) the action of which in connection with the handle of the lever is to raise the pawl 29 and disengage the same from the teeth of the sector.

Upon the shaft s2 between the parts of the standard 11 are cranks s3, secured to the shaft s2. A pin s4 passes across through these cranks, and pivotally mounted thereto is a head of a pin 27. A shaft textends across the standard 11 and is provided with bearings therein, and upon this shaft is pivotally mounted a yoke-rocker t, atits lower end apertured for the passage of the pin 27, and between the lower end of this rocker and the head of the pin 27 and around the pin 27 is a spring 28. A pin 26 passes across through the flanges r3 of the sleeve r, and the upper jaw end of the yoke-rocker t passes between the flanges r3 and at either side of the pin 26.

In the o eration of the parts just described it wi l be noticed that the surfaces of the friction-wheels ZC Zr." are in contact and.

of the lever s, the cranks s3, a movement ofthe pin 27 and spring 28 toward the yokerocker t, a swinging of the yoke-rocker t/ on the shaft t, and a forward movement thereby of the sleeve 1^, housing r', and the bearings of the shaft Z, which form a part of the housing r at op osite sides thereof. After the surfaces o the wheels ZC 7c are brought into actual contact it will be apparent that any further movement of the lever s/ toward the left hand of Fig. 5 will be to compress the spring 28 as between the head of the pin 27 and the lower end of the yoke-rocker t@ This compression will have the effect through the yoke-rocker t, the. sleeve r, and housing r to apply greater pressure of the frictionwheel 7c against the friction-wheel Zr, so as to overcome any tendency of the wheels to slip with reference to one another. As this pressure is applied it will be apparent that the pawl 29 is moved farther along over the surface of the sector s, engaging other teeth of the same toward the left hand, the pawl performing the function of holding the lever in position and keeping constant the strain applied. To make this movement effectual for the movement longitudinally of the table of the machine, of the saw, and its carriage, it will be essential that the lever m be moved to the right hand, so as to cause the clutchteeth of the clutch m t-o engage the clutchteeth 12 of the worin-wheel Z2 and connect the movement and power applied thus to the worm-wheel Z2 for the rotation of the shaft i2, and thereby the longitudinal movement of the carriage and saw. The provision of this increasing tension is .to accommodate the devices to the work, because where the work is light a minimum pressure between the surfaces of the wheels ZC 7c is all that is essential to transfer the power; but where the work is heavy and the saw is obliged to cut through a considerable thickness of metal the pressure between the surfaces of the wheels ZC Zt" must often be increased to the maximum g but -the devices described provide ample latitude between the minimum and maximum of pressure to accommodate the different thicknesses of material, which call for an increased effort on the part of the saw.

To reverse the direction of travel of4 the saw and its carriage, the lever m, Fig. 1, is moved to the left hand, sliding the clutch m along on the shaft i2 from the engagement of its teeth with the teeth 12 of the wormwheel Z2, adjacent to the collar 15, to an engagement of the clutch-teeth of the clutch fm, with the clutch-teeth n against the collar 14, which will then communicate the movement and power applied to the sleeve a, its gearwheel n2, and clutch-teeth n to the clutch m in the reverse direction to rotate the shaft i2 and move the carriage and saw in a backward direction, or, in other words, toward the right-hand end of the machine and toward the wheels ZC Zc, withdrawing the saw from the work.

The action of an attendant in` grasping the handle of the lever s and the hand-laten 31,

and thereby kraising the pawl 29, permits the lever s to be swung over toward the right hand to an extreme position, shifting the parts hereinbefore described to a state of rest, where the surfaces of the wheels ZC ZC are appreciably separated, so that while the wheel Zr may keep on its continuous rotation thc wheel ZC ceases its movement.

ln the group of parts hereinbefore described and their operation there is a possibility of a yielding action under excessive load for the disconnection of the feeding devices for momentarily retarding or stopping the movement of the machine, which is effected in the following manner: Supposing that the thickness ofthe metal being cut increases to too great an extent for the progressive feed of the saw, the saw will be retarded in its movement and a back pressure exerted against the saw, the carriage, and the feed-screw i2. This movement will be trans- IOO will restore the operative condition and conferred from the collar 15 to theworm-wheel Z2, the sleeve r, its flanges r3 to move the` sleeve, as well as the worm-wheel, with the shaft i2 longitudinally of the machine. This movement of course carries with it the bearings of the friction-wheel it, which, as here# inbefore described, are parts of the housing 1*/ to separate the 'friction-wheels 7c 7c and stop the progressive `feeding movement of the saw. This movement is taken up by the movement of the pin 26, the yoke-rocker t against the spring 28 compressing the spring in proportion to the longitudinal movement of the parts, and this movement may be quite slight. It may be momentary, and it may be momentarily repeated so as to relieve the pressure 'from the saw, so that the saw is not injured or destroyed in cutting` the metal, and the movements may be repeated until the saw has gradually cut through the eXtra thickness or eXtra hardness of the metal and normal relations reestablished, when the exiiansive action of the spring 28 tact of the parts to continue the progressive feed.

I el aim as my inventionl. In a metal-sawing machine, the combination with. a movable carriage, a saw earried thereby, means for continuously revolving the saw with the .movement of the carriage, and a feed device for moving the carriage, of a continuouslyrevoluble wheel, a series of continuelisly-revoluble parts, a series of parts adapted to be set in motion` and a means whereby the same may be moved into and out of contact with the continuouslyerevoluble wheel, and a device coupled to the feed. device and adapted to be moved in opposite directions and which when moved in. one direction engages the latter series of parts for the 'forward movement of the saw and its carriage, and which when disengaged therefrom and engaged with the first series of revoluble parts acts to move the saw and its carriage in an opposite or backward direction.

2. In a inetal-sawing machine, the combination with a movable carriage, a saw carried thereby, means for continuously revolving the saw with the movement of the earriage, and a feed device 'for moving the earriage, of a continuously-revoluble wheel, a series oif continuously-revoluble parts, a series of parts adapted to be set in Amotion and a means whereby the same may be moved into and out of contact with the continuously-revolul. le wheel7 a device coupledv to the feed device and adapted to be moved in opposite directions and which when moved in one direction engages the latter series of parts for the forward movement of the saw and its carriage, and which when disengaged therefrom and engaged with the 'first series of revoluble parts acts to move the saw and l eli-9,793

its carriage in an opposite or backward di rection, and means for manually applying a graduated tension to the second series of revoluble devices in proportion to the wort; required of the saw. y

3. In a metalsawing machine, the combi nation with a saw, a carriage, means for contiiiuously revolviiiig the saw during the movement of the carriage and a feed device Vfor moving the carriage, of a frieti mwlreel and means for continuously revolving said wheel with the parts rotating the saw, a ser ond and similar friction-wheel normally in close proximity to the continuously-revoluble wheel, said wheels arranged to have their perinieters engage, a shaft on which said ser:- ond. wheel is mounted, a worm upon said shaft, devices coacting therewith for effect" ing the movement of the devices for proi gressively feeding the saw and carriage along, means for movingl said worm and its` shaft and said second wheel to bring said friction-wheels into contact and for thereafter manually applying thereto a graduated tension according to the work required of the saw.

4C. In a metal-sawing machine, the combination with a saw, a carriage and a powerA shaft, of devices connecting the power-shaft with the saw for continuously revolving the saw, a screwesha'ft, a connection therefrom to the carriage whereby with the rotation of the screw-shaft the carriage is moved, a rontinuoiisly-revoluble wheel on the powershaft, a wheel similar to the aforesaid continuously-revoh'lble wheel and a series of devices coacting therewith and adapted to he operated thereby, and means whereby the two wheels may be brought into contact to actuate the latter series of devices or sepia rated and which devices are also adapted to be engaged with the device movable on the screw-shaft for com'iectii'ig the same with the screw-shaft to effectthe forward movement of the saw and its carriage.

5. In a metal-sawing machine the comhination. with the power-shaft d, the shaft o and the screw-shaft i2, of a bevel-wheel 1- and a belt-flange thereto on the shaft g, a bevelpinion f2 on the power-shaft d meshing with the bevel-wheelf, a gear and beltd lange o", un arbor on which the same is mounted, an ad justable swinging support for said arbor. a belt 17 passing around the beltdlai'ige of the bevel-wheel f and around the l'ielt-l'lange of the gear 02, a sleeve u, gear al and clutchteeth a on the screw-shaft i?, the gear l11% and the gear 02 being in mesh, and said parts continuously revoluble as a series with the movement of the power-shaft d, and a clutch device splined to the screw-shaft fi? and adapted with its movement in. one direction to engage the clutch-teeth fa to reyolve the screw-sh aft if, substantially as set forth.

6. In a metal-sawing machine, the co'mbi lOO nation with the power-shaft cZ, the shaft g and the screw-shaft i2, of a bevel-wheel f and a belt-liange thereto on the shaft g, a bevelpinion f 2 on the power-shaft Z meshing with the bevel-wheel j, a gear and belt-flange c2, an arbor on which the same is mounted, a studplate to which the said arbor is connected and supported, said stud-plate mounted and adapted to swing on the screw-shaft i2 and lying against the frame of the machine, and bolts 18 for securing the said stud-plate in position when the proper tension is applied to the belt 17 by its movement, a belt 17 passing around the belt-flange of the bevelwheel f and around the belt-flange of the gear o2, a sleeve n, gear n2 and clutch-teeth n on the screw-shaft i2, the gear n2 and the gear o2 being y in mesh and said parts continuously revoluble as a series with the revolution of the powershaft d, and a Clutch device splined to the screw-shaft t2 and adapted with its movement in one direction to engage the clutchteeth n to`revolve the screw-shaft t2, substantially as set forth.

7. In a metal-sawing machine, the combination with the power-shaft d and a frictionwheel k on one end of the same and which is continuously revoluble therewith, of a similar friction-wheel ZC, a shaft Z therefor and a worm Z thereon, a screw-shaft Z2 adapted in its rotation to move the saw and carriage along in either direction, a worm-wheel Z2 loose upon the screw-shaft and meshing with the aforesaid worm Z, a clutch connection between the shaft and the wheel Z2, a movable support having bearings for the shaft Z, a lever, a shaft upon which said lever is mounted, cranks upon said shaft, a .pivotally-mounted device acting upon the movable support of the shaft Z, a yielding connection between the same and the aforesaid crank device, and means for applying a graduated tension to the devices in proportion to the pressure required at the surfaces of the friction-wheels ZC, 7.

8. In a metal-sawing machine, the combination withJ the power-shaft Z and a frictionwheel Zr on one end of the same and which is continuously revoluble therewith, of a similar friction-wheel Zf, a shaft Z therefor and a worm Z thereon, a screw-shaft i2 adapted in its rotation to move the saw and carriage along in either direction, a worm-wheel Z2' loose upon the screw-shaft and meshing with the -aforesaid worm Z. a clutch connection between the shaft t2 and the wheel Z2, a sleeve r and housing r', the housing r having side prolongations forming bearings for the shaftA Z near its respective ends whereby the shaft and the wheel ZC carried thereby are movable with the housing, the housing r covering the worm-wheel Z2, a standard 11 with guides providing for the longitudinal movement of the sleeve and housing, a pin 26 passing through thel lower portion of the housing, a

'shaft t, a yoke-rocker t mounted on said shaft and having an upper end coming at either side of the pin 26, a lever s, a shaft s2 on which the same is mounted, a crank device mounted on the shaft s2, a pin 27 having a head at one end pivotally connected to the crank device and at its other end passing through the lower end of the yoke-rocker, a spring 28 around the shaft 27 and between the head thereof, the movement of the lever s swinging the crank device, the yoke-rocker and moving the sleeve, the housing, the worm-wheel, the shaft Z and the frictionwheel Z longitudinally of the screw-shaft 'Z2 so as to bring the friction-wheels Zc 7c into forceful contact and engagement.

9. In a metal-sawing machine, the combination with the power-shaft Z and a frictionwheel lc on one end of the same and which is continuouslfyT revoluble therewith, of a similar friction-wheel Zc, a shaft Z therefor, and a worm Z thereon, a screw-shaft i2 adapted in its rotation to move the saw and carriage along in either direction, a worm-wheel Z2 loose upon the screw-shaft and meshing with the aforesaid worm Z, a clutch connection between the shaft 'i2 and the wheel Z2, a sleeve r and housing r, the housing r having side prolongations forming bearings for the shaft Z near its respective ends whereby the shaft and the wheel Zr carried thereby are movable with the housing, the housing 1 covering the worm-wheel Z2, a standard 11 with guides providing for the longitudinal movement of the sleeve and housing, a pin 26 passing through the lower portion of the housing, a shaft t, a yoke-rocker t mounted on said shaft and having an upper end coming at either side of the pin 26, a lever s, a shaft S2 on which the same is mounted, a crank device mounted on the shaft s2, a pin 27 having a head at one end pivotally connected to the crank device and at its other end passing through the lower end of the 'yoke-rocker, a spring 28 around the shaft 27 and between the head thereof and the yoke-rocker, the movement of the lever s -swinging the crank device, the yoke-rocker and moving the sleeve, the housing, the worm-wheel, the shaft Z and the friction-wheel Z longitudinally of the screw-shaft 'Z2 so as to bring the friction-wheels ZC, Ze into forceful contact and engagement, the further movement of the le- IOO IIO

ver s serving to compress the spring 28 and increase the pressure of contact between the friction-wheels, and means for holding said parts at the desired point imder tension.

10. In a metal-sawing machine, the combination with the power-shaft (Z and a frictionwheel Z: on one end of the same and which is continuously revoluble therewith, of a similar friction-wheel Zc, a shaft Z, therefor, and a worm Z thereon, a screw-shaft i2 adapted in its rotation to move the saw and carriage along in either direction, a worm-wheel Z2 loose upon the screw-shaft and n'ieshing with the aforesaid worm l, a clutch connection between the shaft i2 and the wheel l?, a sleeve r and housing 1, the housing fr having side prolongations forming bearings for the sha' I, near its respective ends whereby the shaft and the wheel fr carried thereby are movable with the housing, the housing r covering the worm-wheel Z, a standard 11. with guides providing for the longit'inlinal movement of the sleeve and housing, a pin 26 passing through the lower portion of the housing, a shaft t, a yoke-rocker t mounted on said. shaft and having an upper end coming at either side of the pin 26, a lever s, a shaft sa on which the same is mounted, a crank device mounted on the shaft S2, a pin 27 having a head at one end pivotally connected to the crank device and at its other end passing through the lowerl end of the yoke-rocher, a spring 28 aronml the shaft 27 and between the head thereof and the 'yoke-rocker, the movement of the lever s swinging the crank device, the yoke-rocker and moving the sleeve, the housing, the worm-wheel, the shaft Z and the friction-wheel l longitudinally of the screw-shaft il so as to bring the friction-wheels, 7c, 7c into forcefnl contact and engagement, the further movement of the lever s serving to compress the spring 28 and increase the pressure of contact between the friction-wl'iecls, a toothed sectorl s secured to the standard. 1.1 and having a part through which the shaft of the lever s p asses, a pawl connected to the lever and adapted to engage the teeth of the sector, and a handlatch 31 by which the pawl is moved and its hold released and the parts permitted to return to an initial position.

l1. In a metal-sawing machine, the combination with a power-shaft and continuously-revoluhle friction-wheel thereon, a carriage and saw and a screw-shaft i2, of a clutch device splined to the shaft i2 and a lever for moving` the same loi'igitudinallv of the shaft, collars on the lshaft for limiting the movement of the clutch device, a sleeve n, clutchteeth a and a gear n2 as an integral structure loosely mounted on the shaft it coming against one of the aforesaid collars and between the same and a fnrtl'ier collar secured to said shaft, a series of devices continuouslyv actuated. hv the revolution of the powershaft for continuously revolving the sleeve n and the parts formed. therewith, a worinwheel loosely mounted on the said shaft i2 at the other side of the clutch device having clutch-teeth adapted to engage the clutch device, a series of devices associated vvdth the said worm-wheel and manuallv operated for transmitting the revolution of the said friction-wheel thereto when in contact, and which devices when engaged bv the clutch device effect the rotation of the shaft in one direction, while the first-named series of revoluble devices effect the rotation of the serenshaft in the opposite direction.

l ed for moving the friction-wheel lr, its shal lcontact with the friction-wheel fr, a sha t l2. ln a metal-sawing nnrchine, the comhination with a power-shaft and eontinnonsljg-revolnlfle friction-v.'heel thereon, a 'arriage and sa fr and. a screw-shaft if, of a clntcl. device splined to the shaft 'if and a lever for moving the same longitndinallj,Y of the shaft` collars on the shaft for limiting the Ymovement of the clutch device, a sleeve n, elntehteeth it and a gear 'a2 as an integral strnctmfe looselj,T mounted. on the shaft 'iff etnning against one of the aforesaid collars and between the same and, a further collar seenred to said shaft, a series of devices eontimionslv actuated b v the revolution of the powershaft for c mtinnonsly revolving the sleeve a and the parts formed therewith, a wormwheel loosely mounted on the said shaft 'ifi at the other side of the clntch device having clutch-teeth adapted to engage the elntch device, a series of devices associated with the said worm-wheel and inn'tnnallv operated for transmitting the revoln tion of the said friction-wheel thereto when in contact, and which devices when engaged by the clntch device etl'ect the rotation of the shaft in one direction, while the first-named series of revolnble devices efllect the rotation of the screwshaft Vin the opposite direction, and a series of coacting devices for moving the worin-wheel. and. the devices associated therewith lon gitndinalljvv of the screw-shaft and also for applying a graduated. tension, snlistantiallj; as set forth.

1.3. in a metal-sawing machine, the combination with a power-shaft, a friction-wlnel r on one end thereof, a carriage andv saw and a screw-shaft fi?, of a friction-wheel /if normallv eloseljvT adjacent to lint not in aetnal contact with the friction-wheel 7.,', a shaft therefor parallel with the power-shaft, movable hearings in which the shaft monnted` a worm on the shaft and a 'worm-irlreel loose on the screw-shaft "L2 meshing therewith, a clutch device for coupling the worm-wheel to the shaft, and mannall,f-operated devices adapted for moving the frietion-wheel tu, its shaft and. support pa ,allel with the screwshaft for bringing the friction-wheels Zr, /ir int o contact to turn the screw-shaft in one direction and move the carriage and saw,

1li. ln a metal-sawing machine, the combination with a power-slnift d, a frictionwheel 7c on one end thereof, a arriage and saw and a screw-shaft i?, of a friction-wlreel tr" normally closelyY adjacent to but not in aetnal therefor parallel with the power-shaft, movable bearings in which the shaft is monntett a worm on the shaft and a worm-wheel loose on the screw-shaft 'ifi meshing therewith, a clutch device for coupling the "worm-wheel to the shaft, inanually-operated devices adapt o UO lOO

and support parallel With tlive screw-shaft for l surfaces of the friction-Wheels according to bringing the friction-Wheels 7c, c into contact the effort required of the saw. lo to turn the screw-shaft in one direction and Signed by me this 23d day of March, 1904. move the carriao'e and saW and other devices i 5 associated Withtthe aforesaid 1nanually-oper CHAS' A' JUENGST' ated devices, and an intervening spring to I l/Vitnesses:

which said devices apply a regulatable ten- AUDLEY W. REYNOLDS, sion for increasing the pressure between the PEROY M. HOWCOTH. 

